Registry device for bag-making machinery



N0v.3,1925- L56Q300 C. W. OMAN REGISTRY DEVICE FOR BAG MAKING MACHINERY,

- Filed April 18. 1924 4 Sheets-Sheet 1 v INVENTOR 4m mo mr ATTORNEYS Nov. 3, 1925. 1,560,300

C. W. OMAN REGISTRY DEVICE FOR BAG IIAKI NG MACHINERY Filed April 13. 1924 4 Sheets-Sheet 2 ATTORNEYS Nov. 3, 1925. 1,566,300

c. w. OMAN REQISTRYDEVIQE FOR BAG MAKING MACHINERY Filed April 18, 1924 4 he ts-Sheet 3 INVENTOR Cam. w. O/YIHA/ ATTORNEY5 Ndv. 3, 1925- 1,560,300 c. w. OMAN REGISTRY DEVICE FOR BAG MAKING MACHINERY Filed April 18. 1924 4 She tsq-Sheet 4 K 7 3 I 19 R 4 Y L\ INVENTOR- {01 C4174 W. OMfP ATTORN EYS Patented Nov. 3, 1925.

UNITED STATES PATENT" ornca.

CARL W. OMAN, OF SOUTH WINDHAM, CONNECTICUT, ASSIGNOR TO THE SMITH & WINCHESTER MFG. 00., OF SOUTH WINDHAM, CONNECTICUT, A CORPORATION OF REGISTRY DEVICE FOR BAG-MAKING MACHINERY.

Application filed April 18, 1924. Serial No. 707,445.

To all whom it may concern:

Be it known that I, CARL W. OMAN, a citizen of the United States of America, residing at South Windham, in the county of Windham and State of Connecticut, have invented certain new and-useful Improvements in Registry Devices for Bag-Making Machinery, of which the following is a specification. g p

My invention relates to a registry device for bag making machinery, and particularly to means for properly synchronizing the operation of related machine elements" mounted on different shafts. While the in-l vention is applicable at various pomts to bag machinery, it is of particular value for chronizing the o eration of the rotary t umb-li and cut-o knives of a bag tuber,

so that th correlated on an acceleration or retardation of the paper feed for the manufacture of bags of different lengths.

In the accompanying drawings, which illustrate a convenient embodiment of my invention in a tuber,

Fig. 1 is a broken longitudinal side elevation of a tuber of the well known Smith and Winchester type, to which my invention isapplied, although it will be understood that by proper modification it may be embodied in tubers of other make;

Fig. 2 is a section on the line 2--2, Fig. 1;

Fig. 3 is a perspective of the thumb-lip knife drawn to a larger scale;

Fig. 4 is a fragmentary transverse section through the thumb-lip knife shaft and certain related parts drawn to a larger scale;

Fig. 5 is an end elevation of said shaft showing drive connections and of the registry devlce;

Fig. 6 is a section on the line 6-6, Fig. 5, drawn to a larger scale;

Figs. 7 and 8 are diagrams illustrating the course of the paper web through the tuber; and

Fig. 9 is a plan view of the tube afte passing the cut-off knife.

In its main features the tuber in which my invention is here illustrated is of establishedtype. It comprises a main frame 15 ey may be readily and accurately having at one end appropriate means for supporting the roll of pa er 16 from which the tubes are formed. he web 17 is led from the roll over idlers 18, 19 and 20 to the bed roll 21, upon which it is engaged by the thumb-lip knife 22.0n the shaft 23 to form the thumb-lips or tabs 24. The web thus pierced at intervals, passes the folders 2 5 and 26 and in its now tubular form, is engaged by the drawing rolls 27 which feed the tube to the cut-off knives 28-29 by which the tube is severed into the lengths desired for bags of different sizes.

The drive of allof the elements of the machine is taken from the pulley shaft 30, and it may be stated generally that the thumblip knife shaft and the cut-off knife shaft rotate at constant and equal speed (assumknives must be made to properly correlate the cuts. This I accomplish by the rotary adjustment of the thumb li knife with respect to its driving gear. econdly, I provide a radial adjustment of the knife with respect to its shaft, so that the peripheral or linear speed of the knife may be made to substantially correspond to the altered speed of the web and thusprevent tearin of the web by the knife'at the moment 0% the lip cut.

The drive of the various parts will be readily followed from Figs. 1, 2 and 5. Thus, the draw rolls 27 are driven from the pulley shaft 30 through gears 31, 32, 33, 34 and 35, the intermeshing gears 34 and 35 beingmounted permanently on'the draw.

roll shafts. Gear 33 which is also on draw roll shaft 36, andits meshing gear 32, are both removable, and are substituted by others when it is desired to vary the speed of the draw rolls, and thus the rate at which theweb is passed through [the tuber to The drive of the thumb-lip knife is alsov taken from -the pulley.. shaft 30, through bevel gear 37 which meshes with bevel gear 38 at one end ofth e. inclined couplin shaft 39. At'the'other end of'the a t r e bev l; ea I4 riv ev s T 41, thegear 42 on which mesheswith idler gear and also radial position with respect to itsshaft'23.

, rounds the shaft 23..: The scale 45 isgradu- ,1 d th t e w th s e -I 4 21 hesh t 23 ofthe thumb-lip knife. I

: thus at a constant, predeterminedspeed,con. responding tothat of. the cut-of'f knives,

28.-'-29, LI. ovide means for-varying both the. -angular; relation thereof to. its driving d. radial adjustment of the knife,I mount a .scale 45in definite position uponthe shaft steadier 46,-the T-bearing 47 offwhich .sur

ated, andopposite the graduations-areleresting against a flat 50 formed in the shaft the bar 49 is clamped by the stirrup 51, if, for instance, change from a bag of .18. in

length to a bag 36" in length be desired, the radial position of the knife 22 with-1e spect to its shaft 23 changed until it registers with the legend36 on the scale 45,

the bearings forshaft 23 being alsoshifted in guide frame 52 by. m ans of an adjusting screw 53 (Fig. 1), until the shaft is properly located to bring the knife 22. into properworking relation with the bed roll 21.

The increased linear speed of the rotaryknifo ineidentto the increase of its radius, now substantially corresponds .to the increased speed of the web and prevents tearing of the web by the knife as it makes the lip out.

loosening the nut 55 the gear 44 can be suf- V ficiently withdrawn from the cone 54 to per-.

mit the shaft 23 to be turnedby hand. I also mount on the inner end of the clutch Gone a dial '56, appropriately graduated around its circumference and with which cooperates a pointer 57 secured to the inner face of the gear 44. An associated chart which the cut-off knives 28 and 29 "are driven -froin '-'-the* pulley shaft illustrated-i obtained;

.While, hedrive of the he attendant s mai sta- 59, advises the attendant as to the proper 1 position of 'the'pointerI57 on the dial 56 for a, bag of definite length. Consequently, by

setting the pointer {37 at the point on the dial--56- indicated by the chart, for a bag =--nngurtime"; ma symmetries of the thumb-lip kni'fe andciitoff'knife 28 is The radial of the thumb-lip .:knife, .22 .and of, the gear 44 are both readily effected witli precision by even an unskilled attendant. There: is the least. possible loss oftime and I, no, I waste of paper such .as 'is now comnron in the cut-and-try procedure;- heretofore practiced.

. In connection. with the adjustment. the

shaftf2 3etongard, and from the axis -of; the

bed .roll 21, .bymeans of the hand screw 53, the mesh between gear 44 on the knife-shaft,

intermediate idler gear 43 and ,drivinggear' 42, is automatically maintained as follows.

The, intermediategear 43 ismounted on a j'stu'd GOwvhich plays freely inthe arcuate guide slot 61 in the. head frame 59. Its proper location in the slot to insure'jqthe mesh. of-. the. gear 43 with gears 42 and 44 .is determined by the links 62 and 63-, of

,which the link 62 is mounted freelyonzthe gends 48 which indicate baglengths. .The}. thumb lip knife 22 iscarried by a bar 49 stud64 of gear 42, while theother'link 63 is mounted freely on shaft 23 .of gear/44) Bosses atthe opposite ends of the linksform 23 adgacent the T-bearing 47, and to wh ch I journals for the stud 60 on opposite sides of the head frame 59, and thus form afloating support for the, stud. Obviously, as

the shaft 23 is adjusted towardor .from

1 trative embodiment of what I claim as my invention, and the further understanding that the particular details of construction may be readily modified. while accomplishing like results, I claim:

1. In a paper bag machine, a pair of rotary shafts, knives thereon adapted to effect relatedcuts in a paper web the speed of travelof which through the machine, may

be varied and registry means for facilitating the adjustment of the relative "position of the knives to synchronize their action upon variation of thefifeed of the web through the machine.

In -a paper bag. machine of the variable speed paper-feed type, a thumb-lip knife, a shaft on which the knife is mounted, a

ear speed to that of the paper web.

3.- In a paper bag machine, a thumb-hp? knife, a rotary shaft on which the knife is mounted, a clutch member fast on the shaft, a driving gear adjustably mounted on the clutch, and cooperating pointer and dial carried by said gear and clutch respectively for locating with exactitude the relative rotary position of the gear and shaft for the purpose set forth. v e

4. In a paper bag machine, a thumb-lip knife, arotary shaft on which the knife is mounted, means for adjusting theknife on the shaft at various distances from the axis of the shaft, means for adjusting'the shaft 2 toward and from the paper web, a gear adjustably mounted at one end of the shaft, a driving gear operatively associated with said gear on the shaft, and registry means for exactly spect to the driving gear.

v determining the relative'rotary position of the gear-driven shaft with re- 5. A registry device for synchronizing related shafts of a bag making machine orthe .like, one of said shafts having a gear there- .on' for driving the shaft, and a clutch connection between the gear and shaft, said registry device comprisig a graduated dial carried by one element of the clutch, and a pointer carried the other element of the clutch, and means for locking the clutch parts in'the relative rotary position indicated by the pointer on the dial.

6.. In a-paper'bag machine, a pair of rotary cutters arranged on spaced axes, means for passing a flat web to one of said knives to effect ac'ut therein, means for folding said flat cut web before it reaches the second knife, and-means for severing the folded web -atsaid second knife, together with registering means for facilitating the adjustment of the relative position of the knives to synchronize their action upon change of speed of the feed of the through the machine.

In testimony whereof f have signed my name to this specification.

*OARL' w; OMAN, I

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